Home / 18,931.79-28,397.72-18,904.46

Finding the Fourth Proportional to 18,931.79, 28,397.72 and 18,904.46

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Solution

The fourth proportional to 18,931.79, 28,397.72 and 18,904.46 is: 28,356.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,931.79 : 28,397.72 = 18,904.46 : x
  2. Step 2: Convert to fraction form
    18,931.79/28,397.72 = 18,904.46/x
  3. Step 3: Cross multiply
    18,931.79x = 28,397.72 × 18,904.46
  4. Step 4: Simplify right side
    18,931.79x = 536,843,467.10
  5. Step 5: Solve for x
    x = 536,843,467.10/18,931.79
  6. Step 6: Final answer
    x = 28,356.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.